CVE-2022-48828NFSD: Fix ia_size underflow
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: NFSD: Fix ia_size underflow iattr::ia_size is a loff_t, which is a signed 64-bit type. NFSv3 and NFSv4 both define file size as an unsigned 64-bit type. Thus there is a range of valid file size values an NFS client can send that is already larger than Linux can handle. Currently decode_fattr4() dumps a full u64 value into ia_size. If that value happens to be larger than S64_MAX, then ia_size underflows. I'm about to fix up the NFSv3 behavior as well, so let's catch the underflow in the common code path: nfsd_setattr().
- CVSS
- 9.1 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d2211e6e34d0755f35e2f8c22d81999fa81cfc71; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 38d02ba22e43b6fc7d291cf724bc6e3b7be6626b; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8e0ecaf7a7e57b30284d6b3289cc436100fadc48; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before da22ca1ad548429d7822011c54cfe210718e0aa7; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e6faac3f58c7c4176b66f63def17a34232a17b0e | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | before 5.4.295; from 5.5 before 5.10.220; from 5.11 before 5.15.24; from 5.16 before 5.16.10; 5.17; 5.17; 5.17 | NVD |
References
- https://git.kernel.org/stable/c/d2211e6e34d0755f35e2f8c22d81999fa81cfc71patch
- https://git.kernel.org/stable/c/38d02ba22e43b6fc7d291cf724bc6e3b7be6626bpatch
- https://git.kernel.org/stable/c/8e0ecaf7a7e57b30284d6b3289cc436100fadc48patch
- https://git.kernel.org/stable/c/da22ca1ad548429d7822011c54cfe210718e0aa7patch
- https://git.kernel.org/stable/c/e6faac3f58c7c4176b66f63def17a34232a17b0epatch
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
- https://cert-portal.siemens.com/productcert/html/ssa-355557.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.